Fixed command interfaces

classes/Commands/ClassTestEnvRPCCommand.php

@@ -10,6 +10,7 @@ use Symfony\Component\Console\Input\InputArgument;
 use Symfony\Component\Console\Input\InputInterface;
 use Symfony\Component\Console\Input\InputOption;
 use Symfony\Component\Console\Output\OutputInterface;
+use Symfony\Component\Console\Command\Command;
 use JsonRpc\Client;
 use CloudObjects\PhpMAE\TestEnvironmentManager;
 
@@ -33,7 +34,7 @@ class ClassTestEnvRPCCommand extends AbstractObjectCommand {
             ->addArgument('parameters', InputArgument::IS_ARRAY, 'The parameters for the method.');
     }
 
-    protected function execute(InputInterface $input, OutputInterface $output) {
+    protected function execute(InputInterface $input, OutputInterface $output): int {
         $this->requireCloudObjectsCLI();
 
         $container = $this->getContainer();
@@ -68,6 +69,7 @@ class ClassTestEnvRPCCommand extends AbstractObjectCommand {
                 : json_encode($client->result, JSON_PRETTY_PRINT));
         else
             $output->writeln("<error>RPC has failed!</error>");
+        return Command::SUCCESS;
     }
 
 }